add a snap file for building snap package on binary factory...

add a snap file for building snap package on binary factory https://binary-factory.kde.org/job/KBlocks_snap/

snapcraft.yaml

+---
+name: kblocks
+version: 20.08.0
+confinement: strict
+grade: stable
+base: core18
+adopt-info: kblocks
+apps:
+    kblocks:
+        common-id: org.kde.kblocks.desktop
+        command: kf5-launch kblocks
+        plugs:
+        - kde-frameworks-5-plug
+        - home
+        - x11
+        - opengl
+        - desktop
+        - network
+        - network-bind
+        - unity7
+        - pulseaudio
+        - desktop-legacy
+        - removable-media
+slots:
+    session-dbus-interface:
+        interface: dbus
+        name: org.kde.kblocks
+        bus: session
+plugs:
+    kde-frameworks-5-plug:
+        content: kde-frameworks-5-qt-5-14-core18-all
+        interface: content
+        default-provider: kde-frameworks-5-qt-5-14-core18
+        target: kf5
+parts:
+    kblocks:
+        parse-info:
+        - usr/share/metainfo/org.kde.kblocks.appdata.xml
+        build-snaps:
+        - kde-frameworks-5-qt-5-14-core18-sdk
+        after:
+        - kde-frameworks-5-env
+        plugin: cmake
+        build-packages:
+        - kdoctools-dev
+        - libkf5kdegames-dev
+        stage-packages:
+        - libkf5kdegamesprivate1
+        - libkf5kdegames7
+        source: http://download.kde.org/stable/release-service/20.08.0/src/kblocks-20.08.0.tar.xz
+        configflags:
+        - "-DKDE_INSTALL_USE_QT_SYS_PATHS=ON"
+        - "-DCMAKE_INSTALL_PREFIX=/usr"
+        - "-DCMAKE_BUILD_TYPE=Release"
+        - "-DENABLE_TESTING=OFF"
+        - "-DBUILD_TESTING=OFF"
+        - "-DKDE_SKIP_TEST_SETTINGS=ON"
+        - "-DCMAKE_FIND_ROOT_PATH=/snap/kde-frameworks-5-qt-5-14-core18-sdk/current"
+    kde-frameworks-5-env:
+        plugin: dump
+        source: https://anongit.kde.org/snap-kf5-launcher.git